Dalilai da hanyoyin gujewa na fashewar walda mai wuyar juriya

Yi amfani da bawul ɗin GFH-D507Mo na kamfanin mu kayan aikin walda na musamman don surfacing, babu fasa a saman.

2. Babban abubuwan da ke haifar da tsatsauran ra'ayi mai ƙarfi

Akwai abubuwa da yawa da ke haifar da tsagewa. Don waldi mai wuyar jure lalacewa, ana iya raba shi zuwa fashe masu zafi waɗanda za a iya samun su bayan wucewa ta farko ko ta biyu, da tsagewar sanyi waɗanda ke bayyana bayan wucewa ta biyu ko ma bayan duk walda.
Tsatsa mai zafi:
A lokacin aikin walda, ƙarfe a cikin kabu na weld da yankin da zafi ya shafa yana sanyaya zuwa yankin zafin jiki mai zafi kusa da layin solidus don samar da fasa.
Ciwon sanyi:
Cracks generated a yanayin zafi kasa da solidus (kimanin a martensitic canji zafin jiki na karfe) yafi faruwa a matsakaici-carbon karafa da high-ƙarfi low-alloy karfe da matsakaici-gawa karfe.

Kamar yadda sunan ya nuna, an san samfurori masu wuyar gaske don tsayin daka. Duk da haka, neman tauri a cikin injiniyoyi kuma yana haifar da raguwar filastik, wato, haɓakar raguwa. Gabaɗaya magana, yin sama sama da HRC60 baya maida hankali sosai ga faɗuwar zafin rana da aka haifar yayin aikin walda. Duk da haka, m surfacing waldi tare da taurin tsakanin HRC40-60, idan akwai wani bukata ga fasa, The intergranular fasa a cikin walda tsari ko liquefaction da multilateral fashe lalacewa ta hanyar babba waldi dutsen dutse zuwa zafi-shafi yankin na ƙananan weld. dutse yana da wahala sosai.

Ko da an shawo kan matsalar tsagewar zafi sosai, za a iya fuskantar barazanar tsagewar sanyi bayan an gama walda, musamman ma kayan da ba su da ƙarfi kamar walda mai tauri, wanda ya fi jin sanyi. Mummunan tsagewa yawanci yakan faru ne sakamakon tsagewar sanyi
3. Muhimman abubuwan da ke shafar ɓarna mai jure lalacewa a saman tudu da dabarun guje wa fasa

Muhimman abubuwan da za a iya bincikowa lokacin da tsagewar ke faruwa a cikin tsarin lalacewa mai wuya kamar haka, kuma an ba da shawarar dabarun da suka dace don kowane abu don rage haɗarin fashewa:

1. Kayan tushe
Tasirin karfen tushe akan rufin ƙasa mai jurewa yana da mahimmanci sosai, musamman ga kayan aiki tare da ƙasa da yadudduka 2 na walda. A abun da ke ciki na tushe karfe kai tsaye rinjayar kaddarorin weld bead. Zaɓin kayan aiki daki-daki ne wanda ke buƙatar kulawa kafin fara aiki. Misali, idan bawul workpiece tare da manufa taurin kusan HRC30 yana surfacing da simintin ƙarfe tushe abu, ana bada shawara a yi amfani da walda abu tare da dan kadan kasa tauri, ko ƙara Layer na bakin karfe matsakaici Layer, don haka kamar yadda. guje wa abun cikin carbon da ke cikin kayan tushe daga ƙara haɗarin fashewar walda.